How many grams of o2 are in 5.0 mol of the element? can someone tell me if i have this right .? 1 mole of o2 = molecular wt of 32
so 5 mol = 32 *5=160 g

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Proving the congruent supplements theorem

Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together? 2.4 hours 2.5 hours